it uses light and warmth to soothe and relieve pain. sounds like science fiction? well, today it's science fact. join me on a journey that is light years ahead. >> announcer: pain: it attacks your body when you least expect it, stops you in your tracks, preys on your mind, robs you of happiness, spirit and freedom. introducing light relief. an fda-cleared, led infrared light therapy that increases circulation and is guaranteed to relieve your pain. finally, there's a fast, natural alternative to pain relief that gets you back to living well, spending time the way you really want, having fun and enjoying the people you love. based on the same technology nasa's been studying for over 20 years to promote cell growth and healing in space, newsweek magazine hails, light therapy "can boost the body's own natural healing process." cbs news in los angeles reports, "navy seals use light therapy in the field daily..."